Method for preparing nano-crystalline cellulose enhanced polyvinyl alcohol foam material with oriented porous structure

The invention discloses a method for preparing nano-crystalline cellulose enhanced polyvinyl alcohol foam material with an oriented porous structure. The method comprises the following steps: A, preparation of suspension mixed liquid: performing acidolysis on plant paper pulp to prepare nanometer crystal whisker suspension liquid, and adding the nanometer crystal whisker suspension liquid into polyvinyl alcohol aqueous solution; B, oriented freezing: pouring the mixed liquid into a container and soaking into liquid nitrogen at the speed less than 0.2mm/s; C, low-temperature vacuum drying: after the growth of ice crystals in the mixed liquid is finished, instantly placing the container filled with the mixed liquid and taken out of the liquid nitrogen, into a vacuum freezing dryer, and taking out the container after the ice crystals are completely sublimated. The method only refers to physical phase change in a foaming process, any chemical medicaments are not used and any chemical reaction ...

Method for carrying out graphic computation through Region type region instead of AutoCAD region

The invention discloses a method for carrying out graphic computation through the Region type region instead of the AutoCAD region. The method comprises the following steps that S1, AutoCAD linear graphic objects are obtained and subjected to resampling, and the graphic objects are expressed through a coordinate point set P; S2, a region constructor function is set up, the point set P obtained through resampling in the step S1 is input to the region constructor function, and construction of the Region type region is completed; S3, relevant graphic computation methods are achieved based on the Region type region. The region can be constructed through self-intersection linear objects, linear objects with local positions not closed, and turnaround linear objects.

Artificial plate for greening and manufacture method thereof

The present invention belonging to the field of artificial board discloses an artificial board for greening and a manufacturing method thereof. The artificial board is made of wooden materials and by compacting green plant seeds. The present invention has characteristics of soilless culture, flexible manufacture and arrangement, strong humidity controlling function because of wooden materials, light weight, no excessive load to buildings, easy regeneration and the like, The artificial board can be used in the fields of highway greening, slope greening, vertical greening, indoor greening and the lile.

Novel servo-operated mechanism of warping machine

The invention relates to a novel servo transmission mechanism for a warping machine, which is characterized in that: the motor is electrically connected with an automatic control device for controlling a large screw and a retarder and coordinating with rotation speed of the active rolling axis; the power output axis of the retarder is equipped with a synchronous belt wheel (e) which is connected with an active rolling wheel axis arranged on the rear portion of a rack vertical arm through a synchronous belt (f) for transmission, two active rolling wheels are disposed on both ends of the activerolling wheel axis by bearings, while assembled on a ground track; bottom feet of the rest two vertical arms are provided with passive rolling wheels respectively which is also assembled on the ground track, driven by active rolling wheel and moves synchronously. As proven by the test result, the mechanism avoids shortcomings of jitter of the machine, servo motor protection or the like completely, and ...

Method for producing multi-layer board using poplar board, enzyme treated lumber and stalk fibre

The invention relates to a method for manufacturing a multilayer board by a poplar veneer, enzyme treated wood and straw fiber. The method is characterized by comprising the following steps: (1) manufacturing wood fiber; (2) manufacturing the straw fiber; (3) processing the wood and the straw fiber by enzyme; (4) manufacturing a high-density fiber board; and (5) assembling and compregnating the poplar veneer and the fiber board into the multilayer board. The method has the advantages of improving the bonding performance by the enzyme treated wood and straw fiber, manufacturing the high-density fiber board by the enzyme treated wood and straw fiber, being capable of enlarging material sources of the multilayer board by manufacturing the multilayer board by replacing part of the veneers, and using the wood felling and processing remainders and crop straw materials. The enzyme treated wood and straw fiber improve the wetting property of the multilayer board (a surface contact angle is reduced ...

Composite curing agent and preparation method thereof

The invention relates to a resorcinol-formaldehyde resin/resorcinol-phenol-formaldehyde resin composite curing agent and a preparation method thereof. The composite curing agent is characterized by comprising the following components in parts by weight: 5-20 parts of polyformaldehyde or hexamethylenetetramine, 5-20 parts of starch or soybean protein isolate and 5-20 parts of inorganic substance powder. The composite curing agent has the advantages of normative technique and the like, and is simple to operate and easy to implement. The active period of the composite curing agent is more than 4 hours when being compounded with the resorcinol-formaldehyde resin and resorcinol-phenol-formaldehyde copolymer resin; and the composite curing agent can satisfy the requirements for active period of HLULAM, wood glulam beams, wood glulam columns, I beams and other wood structure components as well as large-size wood glulam furniture and other products with various shapes and sizes (especially irregular ...

Method for performing high-frequency prepressing treatment on formaldehyde-free soybean glue environment-friendly type China fir floor base material

The invention relates to a method for performing high-frequency prepressing treatment on a formaldehyde-free soybean glue environment-friendly type China fir floor base material. The method is characterized by comprising the following steps of: processing a China fir unit; gluing a China fir plate material or veneer; combining blanks, wherein the combined blank has a three-layer or multi-layer structure; performing high-frequency prepressing treatment, wherein the power of a high-frequency prepressing machine is 50 to 100 kw, the plate voltage is 6 to 10 kV, the plate current is 4 to 10 A, the grid current is 0.5 to 2 A, the ratio of the plate current to the grid current is maintained to be 4 to 7, and the prepressing pressure is 1.0 to 2.5 MPa; and performing hot pressing and post-processing. The method has the advantages that: after the high-frequency prepressing treatment, water content of plate blanks is quickly reduced; the China fir floor base material is heated and softened from ...

Manufacturing method of wood/hybrid Chinese pennisetum composite artificial board

Case sled formula natural gas power unit device

The utility model provides a case sled formula natural gas power unit device, including LNG gasification treatment system, natural gas power unit system, container, the LNG gasification treatment system includes LNG storage tank, vaporizer, the pressure regulating metering device who connects gradually, and odorizing device locates between vaporizer, the pressure regulating metering device, natural gas power unit system includes engine and generator, and pressure regulating metering device passes through the pipeline and is connected with the engine, and the engine drives the generator electricity generation, above device all sets up in the container. The utility model discloses with the system integration of natural gas gasification treatment to the generating set in, market requirement that can single -stop -type solution end user, be equipped with heat exchanger between engine and radiator, utilize the heat of engine cooling liquid, but the energy saving can provide the power output ...

Composite floor continuous laminating technique

The invention relates to a composite floorboard (including double-layer, triple-layer and multi-layer floorboards) continuous laminating technology and the method. The novel technology and method comprise the following steps: uniformly applying water-base adhesive cured at a normal temperature, such as water-base isocyanate (EPI) glue, etc. on a cemented surface of the composite floorboard (a base material or a surface board), with application amount of glue in the range of 120-160g/m<2>; irradiating with far infrared (IR) rays to evaporate water in the water-base adhesive and activate adhesivity in the water-base adhesive; assembling the base material and the surface board; and subjecting to press gluing after the assembled base material and the surface board enter a continuous cold press, with unit pressure in the range of 1.2-1.6 MPa and cold pressing time in the range of 30s-1.5min. In the procedures of applying glue, IR irradiating, assembling, cold pressing and laminating, the base ...

Method for converting AutoCAD data into GIS spatial data

The invention discloses a method for converting AutoCAD data into GIS spatial data. The method comprises the following steps: 1, opening a graphic document to be processed in AutoCAD software, and performing ID marking on all graphic objects in the graphic document; 2, performing text marking on the graphic objects; 3, acquiring the basic attribute of the graphic objects; 4, establishing spatial databank conversion, and storing the data. As the AutoCAD data are converted into GIS spatial data and are shared in time, all information (including the basic attribute and the expansion attribute) in AutoCAD is maintained in the converted graphs, the data amount to be converted can be controlled according to different precision requirements, and the application range of the AutoCAD data is widened.

Middle arranged tension device

The invention relates to a center disposed tension device of a warping machine, which is characterized in that: the motor is a vector frequency control motor electrically connected with an automatic control device for controlling rotation speed of let-off tension roller; the tension roller is disposed on bottom portion between two yarn guide rollers; pins are disposed on inner surface of the yarnoutlet on the wall of the left box body and the right box body respectively, two connection plates are movably engaged with pins through a central hole, both ends of the tension rod (a) and the tension rod (b) are attached on both sides of the pin engaged with central holes of two connection plates; a pressure sensor contact is disposed on inner surface wall of left or right box body, which is incontact with the bottom side of the tension rod (a) axle neck permanently. The center disposed tension device makes the yarn form a wrapping angle through the yarn guidance roller, the tension roller, and ...

Distribution method for wide-body ring-type flaker

According to the material distribution method for the wide-body ring-type flaker, wood chips can be uniformly distributed into the cutting chamber of the ring-type flaker, the material distribution effect is good, the production cost is low, and the applicability is high. The wide-body ring type flaking machine comprises a machine base, an impeller, a cutter ring and a rotary material distributing device, wherein the material distributing device comprises a first-stage material distributing plate, a second-stage material distributing plate, a connecting rod and a transmission shaft; the first-stage material distributing plate comprises a vertical first-stage material distributing straight plate and first-stage material distributing wing plates connected to the two sides of the first-stage material distributing straight plate, and the second-stage material distributing plate comprises a vertical second-stage material distributing straight plate and second-stage material distributing wing ...

Synthetic method for urea resin precipitates and application of precipitates as amine resin adhesive improver

The invention discloses a synthetic method for urea resin precipitates. The synthetic method comprises the following steps: regulating the pH value of formaldehyde solution to 1-5 by virtue of strong acid; adding urea into the formaldehyde solution in a molar ratio of formaldehyde/urea of 0.5-1; reacting under a stirring condition at 30 DEG C-90 DEG C, continuously stirring to react for 1-3 hours when white cloudy turbidity appears, and then cooling to the room temperature to obtain a urea resin precipitate solution; ultrasonically oscillating and homogenizing the obtained urea resin precipitate solution for 15-120 minutes; carrying out suction filtration onto the urea resin precipitate solution to obtain the urea resin precipitates, washing the urea resin precipitates until the urea resin precipitates are neutral, and drying at 30-70 DEG C until the weight is constant. The invention further discloses application of the urea resin precipitates as an amine resin adhesive improver. The urea ...

Method utilizing fast-growing poplar and straw to save and substitute for wood to manufacture electrical packaging case of electromechanical product

The invention provides a method utilizing fast-growing poplar and straw to save and substitute wood to manufacture an electrical packaging case of an electromechanical product. The working procedures of the method are as follows: (1) a skid is manufactured by laminated timber of a poplar veneer; (2) a sleeper is manufactured by the multi-layer compounding of the poplar veneer and a straw fiberboard; (3) the poplar veneer and the straw fiberboard are compounded to manufacture a horizontal brace, a diagonal brace, an upright post, a beam brace, a top part and panels of a lateral plate, an end plate and a top cover plate; (4) the two ends of the sleeper are fixed on the skid to form a base; (5) the panel of the lateral plate and a waterproof cloth are nailed on a frame combined by the horizontal brace, the diagonal brace and the upright post, so as to form the lateral plate; (6) the panel of the end plate and the waterproof cloth are nailed on the frame combined by the horizontal brace, the ...

Dust-containing waste liquid circulating treatment device

The utility model provides a dust-containing waste liquid circulating treatment device which comprises a buffer water tank, and the buffer water tank is divided into a settling chamber and a dilutingchamber which are separated by a partition plate and are communicated at the upper side; a water inlet for introducing dust-containing waste liquid is formed in the bottom of one side, far away from the dilution chamber, of the precipitation chamber; the dilution chamber is provided with a water replenishing port and a water outlet; the upper part of the inclined grid plate is far away from the dilution chamber, and the lower part of the inclined grid plate is close to the dilution chamber; a pollution discharge track is arranged at the bottom of the settling chamber. The device can be used for efficiently separating harmful gases such as dust and formaldehyde in the dust-containing waste liquid and independently recycling the harmful gases, avoids secondary emission pollution, and has theadvantages ...

Method for enhancing surface antibacterial and wear-resisting property of Chinese fir by using wood micron/nano fibril

The invention discloses a method for enhancing the surface antibacterial and wear-resisting property and other properties of Chinese fir by using wood micron/nano fibril. The method comprises the following process steps: 1, preparing the wood micron/nano fibril, 2, preparing a mixed solution, 3, preparing the Chinese fir, 4, coating resins on the Chinese fir surface, 5, ageing, 6, thermally pressing, and 7, post-processing; the thermally pressed Chinese fir needs to be naturally cooled for 1-2 hours, then to be stacked for 2-3 days to release the inner stress and balance the moisture content. The method has the advantages that the distinct surface texture on the Chinese fir can be kept since the wood micron/nano fibril has high transmittance; and the Chinese fir surface cellulose content is improved to perfect the size stability, the surface hardness and the wear-resisting property since the main chemical component of the wood micron/nano fibril is cellulose. Compared with the resin processed ...

Method utilizing fast-growing poplar and straw to save and substitute wood to manufacture electrical packaging case of electromechanical product

The invention provides a method utilizing fast-growing poplar and straw to save and substitute wood to manufacture an electrical packaging case of an electromechanical product. The working procedures of the method are as follows: (1) a skid is manufactured by laminated timber of a poplar veneer; (2) a sleeper is manufactured by the multi-layer compounding of the poplar veneer and a straw fiberboard; (3) the poplar veneer and the straw fiberboard are compounded to manufacture a horizontal brace, a diagonal brace, an upright post, a beam brace, a top part and panels of a lateral plate, an end plate and a top cover plate; (4) the two ends of the sleeper are fixed on the skid to form a base; (5) the panel of the lateral plate and a waterproof cloth are nailed on a frame combined by the horizontal brace, the diagonal brace and the upright post, so as to form the lateral plate; (6) the panel of the end plate and the waterproof cloth are nailed on the frame combined by the horizontal brace, the ...

Method of utilizing compound enzyme improved straw particle and urea acetal resin glue performance

Artificial board and manufacturing method

The invention provides a method for manufacturing an artificial board which has a rich source of raw materials, can fully utilize the raw materials, has a simple process, simple equipment and low cost and can obtain a high-performance structure. The artificial board prepared by the method has a density of 0.6 to 2.5g/cm<3>, a modulus of rupture (MOR) of 30 to 75MPa, a modulus of elasticity (MOE) of 4.5 to 12GPa, a nail-holding capacity of 1,200 to 2,500N and a thickness swelling rate of water absorption of below 8 percent and can serve as a building beam, a wooden pillar, a template, a platform floor, a decorative material, a furniture material, a floor, an irregular molded structure material and the like. The preparation method comprises the following steps of: pre-cooking the raw materials, such as brush woods, fast-growing intermediate-cutting thinning timbers, bamboos, agricultural straws, timber processing scrap materials, logs and the like; dehydrating and blasting the pre-cooked ...

Method for improving performances of bean gum-poplar plywood by utilizing micro/nano-fibrils

The invention relates to a method for improving the performances of a bean gum-poplar plywood by utilizing micro/nano-fibrils, which is characterized in that the method comprises the following process steps: 1) preparing the micro/nano-fibrils; 2) preparing a veneer; 3) treating a face veneer; 4) applying gum on a core plate; 5) carrying out assembly; 6) prepressing; 7) hot-pressing; and 8) carrying out post-treatment. The method has the advantages of improving the surface abrasion resistance by 30-50% by adding a small number of the micro/nano-fibrils into melamine resin and then coating on the surface of the face veneer of the bean gum-poplar plywood, and improving the bonding strength of the bean gum-poplar plywood by 40-60% by applying the bean gum on two surfaces of the core plate or the short core plate and adding a small number of the micro/nano-fibrils into the beam gum.

Method for synthesizing melamine-formaldehyde resin precipitate and application of melamine-formaldehyde resin precipitate as amino resin adhesive improver

The invention discloses a method for synthesizing a melamine-formaldehyde resin precipitate. The method comprises the following steps of adjusting the pH value of a formaldehyde solution to be 1-5 with strong acid; adding melamine into the formaldehyde solution according to the molar ratio of formaldehyde to melamine being (0.5-1); reacting at 30-90 DEG C under a condition of stirring, and cooling to obtain a melamine-formaldehyde resin precipitate solution; homogenizing the obtained melamine-formaldehyde resin precipitate solution by virtue of ultrasonic vibration; carrying out suction filtration on the melamine-formaldehyde resin precipitate solution to obtain the melamine-formaldehyde resin precipitate, washing with water to be neutral, and drying at 30-70 DEG C to constant weight. The invention also discloses an application of the melamine-formaldehyde resin precipitate as an amino resin adhesive improver. By virtue of the melamine-formaldehyde resin precipitate disclosed by the invention ...

Method for enhancing paperless membrane-coated artificial board by micro/nano fibril

The invention relates to a method for enhancing a paperless membrane-coated artificial board by micro/nano fibrils, which mainly comprises the following process steps: using wood pulp as a raw material, and preparing a micro/nano fibril material with an ultrasonic cell disruption apparatus; mixing micro/nano fibril dispersion solution and water-soluble phenolic (or melamine) resin; coating the well mixed solution of the micro/nano fibrils and the resin on the surface of a prepared artificial board (such as a plywood, a fiberboard or a particleboard) substrate; aging the artificial board with the surface coated with the mixed solution of the micro/nano fibrils and the resin, and feeding the artificial board into a hot press for hot pressing; and naturally cooling and stacking the membrane-coated artificial board after being hot-pressed. The invention has the advantages that: the mixed solution of the micro/nano fibrils and the resin is coated on the surface of the artificial board, and the ...

Double-sawblade lumber manufacturing circular sawing machine

The invention discloses a duplex circular saw machine used for a log material manufacturing. A data list including the required material specifications is inputted to a computer system ahead. When appearance size parameters of the log to be manufactured are inputted into the computer system, the computer can decide an optimized processing plan according to the required material specifications and can control a corresponding position of the horizontal and vertical movement of the circular saw machine so as to realize a feeding on both width and thickness directions. When the log transferred by a feeding truck passes through the duplex circular saw machine, one standard plate can be sawed by one time and then the plate is transferred by a plate-transferring device to a specified position for stacking.

Method for producing multi-layer board using poplar board, enzyme treated lumber and stalk fibre

The invention relates to a method for manufacturing a multilayer board by a poplar veneer, enzyme treated wood and straw fiber. The method is characterized by comprising the following steps: (1) manufacturing wood fiber; (2) manufacturing the straw fiber; (3) processing the wood and the straw fiber by enzyme; (4) manufacturing a high-density fiber board; and (5) assembling and compregnating the poplar veneer and the fiber board into the multilayer board. The method has the advantages of improving the bonding performance by the enzyme treated wood and straw fiber, manufacturing the high-density fiber board by the enzyme treated wood and straw fiber, being capable of enlarging material sources of the multilayer board by manufacturing the multilayer board by replacing part of the veneers, and using the wood felling and processing remainders and crop straw materials. The enzyme treated wood and straw fiber improve the wetting property of the multilayer board (a surface contact angle is reduced ...

Glue-saving roller glue coating system

The invention provides a glue-saving roller glue coating system by using which 20 to 50 percent of glue amount can be saved, so that the obvious glue saving effect is realized. The glue-saving roller glue coating system comprises a first glue-saving glue coating roller, a first glue squeezing roller, a first glue applying roller, a transmission part, a glue mixing and supplying part and a machine frame, wherein the first glue-saving glue coating roller, the first glue squeezing roller and the first glue applying roller are respectively and rotatably arranged on the machine frame; the transmission part drives each of the first glue-saving glue coating roller, the first glue squeezing roller and the first glue applying roller to rotate; the axes of the first glue-saving glue coating roller, the first glue squeezing roller and the first glue applying roller are parallel to one another; the outer periphery of the first glue squeezing roller is in contact with the outer periphery of each of ...

Compressing mechanism of regular hexagonal prism workblank rack shaping machine

The invention relates to a compressing mechanism of a regular hexagonal prism workblank rack shaping machine, and solves the problems that during rack shaping processing of a regular hexagonal prism workblank, a workpiece is difficult to be precisely positioned in the horizontal direction and the vertical direction, and the rack shaping precision cannot be easily ensured. The compressing mechanism comprises a horizontal work table capable of leftwards and rightwards moving, wherein a V-shaped backer is vertically arranged on the horizontal work table, in addition, the angular bisector of the V-shaped surface of the V-shaped backer is parallel to the work table, a press rod and a horizontal plane are inclined for 60 degrees, a compressing powder device used for driving the press rod to move along the axial direction is arranged on the horizontal work table, the end part of the press rod is provided with a front V-shaped press block and a back V-shaped press block arranged along the longitudinal ...

Method for converting ordinary phenolic resin into quick-curing wood structure adhesive

The invention discloses a method for converting ordinary phenolic resin into a quick-curing wood structure adhesive. The method comprises the following steps: (1) preparing an adhesive main agent; (2) preparing a curing agent; and (3) mixing the adhesive main agent and the curing agent in a certain ratio to obtain a wood-structure adhesive capable of rapidly curing under a hot pressing or cold pressing condition. The method has the advantages that the phenolic resin is ordinary commercially-available or finished thermoplastic or thermosetting phenolic resin, and is copolymerized and condensed together with an enhancer under the conditions of certain pH value and temperature to obtain the adhesive main agent; a main curing agent and an extender are mixed in a certain ratio to obtain the curing agent; the prepared wood structure adhesive has the advantages of dual components, long shelf life, high gluing strength, water resistance, weather resistance, capability of curing under the condition ...

Method of utilizing compound enzyme improved straw particle and urea acetal resin glue performance

The invention relates to a method for using compound enzyme to improve gluing property between straw shavings and urea-formaldehyde resin, of which technique steps are as follows: (1) straws are processed into shaving units of straw units with a length of 20-25mm though a straw cutter before being put into an enzyme processing reactor; (2) 20kg citric acid-sodium dihydrogen phosphate buffer solution with pH5.0 is added into 1kg straws, in which enzyme solution of the compound enzyme is then added, (3) processing time in the enzyme processing reactor is 4 to 8 hours and processing temperature is 40 to 50 DEG C; (4) the straw shavings after being processed is dried and the temperature of 80-100 DEG C causes the moisture content of the straw shavings to reach 3-5 percent; (5) 12-14 percent (percentage between absolute resin and absolute dry straw shavings) of urea-formaldehyde resin adhesive is added into the straw shavings obtained in the step (4); (6) the straw shavings are formed, precompressed ...

Omposite floor continuous laminating techniqu

The invention relates to a composite floorboard (including double-layer, triple-layer and multi-layer floorboards) continuous laminating technology and the method. The novel technology and method comprise the following steps: uniformly applying water-base adhesive cured at a normal temperature, such as water-base isocyanate (EPI) glue, etc. on a cemented surface of the composite floorboard (a base material or a surface board), with application amount of glue in the range of 120-160g/m<2>; irradiating with far infrared (IR) rays to evaporate water in the water-base adhesive and activate adhesivity in the water-base adhesive; assembling the base material and the surface board; and subjecting to press gluing after the assembled base material and the surface board enter a continuous cold press, with unit pressure in the range of 1.2-1.6 MPa and cold pressing time in the range of 30s-1.5min. In the procedures of applying glue, IR irradiating, assembling, cold pressing and laminating, the base ...

Small-diameter round log centering and clamping transmission method and device

The invention provides a small-diameter round log centering and clamping transmission method and device which are used when small-diameter round logs are longitudinally machined, can center and clamp the round logs while feeding the round logs, and can improve the percentage of outturn of the small-diameter round logs. The transmission device comprises an axial drive mechanism and at least three pairs of centering rollers, wherein the axial drive mechanism drives the round logs to move in the axial direction; at least two pairs of centering rollers are in a big-end-down conical shape; at least one pair of centering rollers is in a big-end-up inverted conical shape; the two centering rollers of each pair are symmetrically distributed on the two sides of the round logs; the centering rollers are arranged on a pivot in a rotary mode; a pivot drive mechanism is arranged between a workbench and the pivot and enables the pivot to move towards the round logs and clamp the round logs between each ...

Novel servo-operated mechanism of warping machine

The invention relates to a novel servo transmission mechanism for a warping machine, which is characterized in that: the motor is electrically connected with an automatic control device for controlling a large screw and a retarder and coordinating with rotation speed of the active rolling axis; the power output axis of the retarder is equipped with a synchronous belt wheel (e) which is connected with an active rolling wheel axis arranged on the rear portion of a rack vertical arm through a synchronous belt (f) for transmission, two active rolling wheels are disposed on both ends of the active rolling wheel axis by bearings, while assembled on a ground track; bottom feet of the rest two vertical arms are provided with passive rolling wheels respectively which is also assembled on the ground track, driven by active rolling wheel and moves synchronously. As proven by the test result, the mechanism avoids shortcomings of jitter of the machine, servo motor protection or the like completely, ...

High surface density fiberboard and manufacturing method thereof

The invention provides a method for manufacturing a high surface density fiberboard aiming at the problem brought by a surface precured layer on the surface of the fiberboard. According to the method, a sanding process in the fiberboard production process can be avoided, the precured layer in fiberboard production is fully utilized, the fiber loss is reduced, and the high surface density fiberboard product is directly produced. Meanwhile, the production cost can be reduced, and the defects such as low fiber hardness and low wear resistance can be effectively solved. The method comprises the following steps: (a) performing vacuum dust removal on the upper and lower surfaces of a non-sanded fiberboard blank after hot pressing; (b) respectively spraying modified adhesive on the upper and lower surfaces of the board blank and pre-drying the sizing surface; (c) flattening the pre-dried board on a cold press, so that the surface density of the board is 1.0g/cm<3> or above; (d) spraying the modified ...

Functional wood-based composite material and manufacture method thereof

The invention provides a preparation method for a functional wood-based composite material. Sanding process of the production process of a chipboard, a flakeboard or a fibreboard can be saved, procuring layers of the chipboard, the flakeboard or the fibreboard are used adequately for reducing the loss of the wooden unit, reducing the production cost and effectively solving defects of the chipboard, the flakeboard or the fibreboard which are small in surface density, low in hardness, poor in abrasion performance and single in function and the like. The preparation method comprises the following steps: a, vacuum cleaning for the upper and lower surfaces of the blanks of the chipboard, the flakeboard or the fibreboard which are not sanded; b, respectively shower coating functional adhesive on the upper and lower surfaces of the blanks and pre-drying the surfaces with the adhesive; c, pressing the pre-dried boards on a cold pressing machine to obtain the boards which are more than 1.0g/cm<3 ...

Method for manufacturing cellulose micro-nano-material enhanced adhesive by using enzyme treatment and mechanical method

The invention discloses a method for manufacturing a cellulose micro-nano-material enhanced adhesive by using enzyme treatment and a mechanical method. The method mainly comprises the following process steps of: selecting wood paper pulp fibers as a raw material, and drying the raw material naturally in a dispersed state; crashing and screening the naturally dried wood paper pulp fibers; adding the screened wood paper pulp fibers and citric acid-disodium hydrogen phosphate buffer solution of which the pH is 4.8 into a reaction container for performing enzyme treatment; manufacturing fibers after the enzyme treatment into a cellulose micro-nano-material by adopting a high-voltage nano-homogenizer or an ultrasonic cell disruption system in a machining mode; adding the cellulose micro-nano-material into a water-soluble phenolic aldehyde or urea-formaldehyde resin adhesive and applying the mixture to the surfaces of veneers, fibers or wood shavings; and hot-pressing the veneers, the fibers ...

Method for manufacturing EO-grade flame-proof, abrasion-proof, mildew resistant and moisture-proof veneer overlay wood veneer

The invention relates to a method for manufacturing E0 grade veneer overlaid plywood with inflaming retardance, abrasion resistance, rot resistance and moisture protection. The method comprises the following steps: selecting a dried veneer; rubberizing the veneer in two sides; assembling after rubberizing, with veneer structure layers being odd number; carrying out prepressing treatment after assembly; carrying out hot pressing treatment after the prepressing treatment; entering naturally cooling, depositing and sanding after the hot pressing treatment; coating masking agent, which is to apply aldehydeless gummy masking agent on a baseplate of the plywood to cover color difference of the baseplate surface to lead the baseplate surface to be in light yellow; applying E0 grade urea-formaldehyde resin adhesive on the baseplate by a pasting machine after the masking agent is dried; and pasting veneer on the baseplate, and carrying out abrasion-resistant treatment to the surface after hot pressing ...

Wooden combined material of functional type

The utility model provides a wearability is good to the wooden combined material of functional type with low costs that produces of shaving board, flakeboard or the fibreboard slab of sand light not after the hot pressing. It has functional type adhesive layer including the shaving board, flakeboard or the fibreboard slab that have pre cured layer on the upper and lower surface of slab, and functional type adhesive layer covers pre cured layer to the functional type adhesive dipes among the pre cured layer.

High -performance fiber board

The utility model provides a wearability is good to the high -performance fiber board with low costs that produces of the fibreboard slab of sand light not after the hot pressing. It has modified adhesive layer including the fibreboard slab that has pre cured layer on the upper and lower surface of fibreboard slab, and modified adhesive layer covers pre cured layer to the modified adhesive adhesion agent dipes among the pre cured layer.

Preparation method of long wood chip for oriented strand board

The invention provides a long wood chip preparation method for an oriented strand board, which is simple to adjust and convenient to control, realizes preparation of long wood chips with different sizes by directly setting the feeding speed and the rotating speed of a knife roll, does not need to stop to replace equipment, is low in production cost and is convenient to realize continuous production. A cutting mechanism of the drum chipper is of a single fly cutter roller structure, feeding speed control and cutter roller rotating speed control are synchronously and reversely linked to set the cutting step length, namely, the rotating speed of a feeding roller is increased, the rotating speed of the cutter roller is reduced at the same time, the cutting step length of a fly cutter acting on wood is maximized, and therefore the length of wood chips is increased.

Synthetic method of carbamide-melamine-formaldehyde ternary polymerization resin precipitation and application of carbamide-melamine-formaldehyde ternary polymerization resin precipitation as amine resin adhesive improver

The invention discloses a synthetic method of a carbamide-melamine-formaldehyde ternary polymerization resin precipitation. The synthetic method comprises the following steps: regulating the pH value of a formaldehyde solution to 1-5 by using strong acid; adding carbamide and melamine to the formaldehyde solution according to the mole ratio of formaldehyde/(carbamide+melamine) being 0.5-1; reacting at 30-90 DEG C under the condition of stirring, reducing to room temperature to obtain a carbamide-melamine-formaldehyde ternary polymerization resin precipitation solution; and carrying out ultrasonic concussion homogenization treatment on the obtained carbamide-melamine-formaldehyde ternary polymerization resin precipitation solution, then carrying out suction filtration, washing to neutrality, and drying under the condition of 30-70 DEG C. The invention also discloses an application of the carbamide-melamine-formaldehyde ternary polymerization resin precipitation as an amine resin adhesive ...

Method for improving performances of bean gum-poplar plywood by utilizing micro/nano-fibrils

The invention relates to a method for improving the performances of a bean gum-poplar plywood by utilizing micro/nano-fibrils, which is characterized in that the method comprises the following process steps: 1) preparing the micro/nano-fibrils; 2) preparing a veneer; 3) treating a face veneer; 4) applying gum on a core plate; 5) carrying out assembly; 6) prepressing; 7) hot-pressing; and 8) carrying out post-treatment. The method has the advantages of improving the surface abrasion resistance by 30-50% by adding a small number of the micro/nano-fibrils into melamine resin and then coating on the surface of the face veneer of the bean gum-poplar plywood, and improving the bonding strength of the bean gum-poplar plywood by 40-60% by applying the bean gum on two surfaces of the core plate or the short core plate and adding a small number of the micro/nano-fibrils into the beam gum.

Middle arranged tension device

The invention relates to a center disposed tension device of a warping machine, which is characterized in that: the motor is a vector frequency control motor electrically connected with an automatic control device for controlling rotation speed of let-off tension roller; the tension roller is disposed on bottom portion between two yarn guide rollers; pins are disposed on inner surface of the yarn outlet on the wall of the left box body and the right box body respectively, two connection plates are movably engaged with pins through a central hole, both ends of the tension rod (a) and the tension rod (b) are attached on both sides of the pin engaged with central holes of two connection plates; a pressure sensor contact is disposed on inner surface wall of left or right box body, which is in contact with the bottom side of the tension rod (a) axle neck permanently. The center disposed tension device makes the yarn form a wrapping angle through the yarn guidance roller, the tension roller, ...